Beginning in the fall of 2003 an exhaustive search has been made of electronic and paper databases including (Infotrac, Cambridge Science, Agricola, Biological Sciences and the Biological and Agricultural Index) under the headings of wildlife, highways, noise, animal, noise pollution, roads, urban noise and the various groups of animals (fish, reptile, amphibian, bird, mammal). A search of all references was made and the bibliographies of all materials were reviewed for additional sources.
